Inventor · disambiguated record
Virgil E. Springer
Also filed as: SPRINGER VIRGIL E
3 granted patents·59 citations·filing 1983–1983
73Inventor score
Files withREGAL INT INC3
Top patents by PatentIndex Score
3 records- 0171US4431704AComposition for blowout preventerREGAL INT INC·Filed 1983·Granted Feb 14, 1984·21 cites·24 claims
- 0260US4480843APolymeric annular snubbing apparatusREGAL INT INC·Filed 1983·Granted Nov 6, 1984·22 cites·18 claims
- 0358US4419479AReinforced carboxy nitrile polymer compositions containing particulate nickelREGAL INT INC·Filed 1983·Granted Dec 6, 1983·16 cites·22 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →